public static void checkCompleted()

in src/main/java/com/spotify/futures/FuturesExtra.java [1034:1038]

• 5 lines of code
• 2 McCabe index (conditional complexity)

  public static <T> void checkCompleted(ListenableFuture<T> future) {
    if (!future.isDone()) {
      throw new IllegalStateException("future was not completed");
    }
  }